CN115225842A - High-definition system of broadcast television front end - Google Patents
High-definition system of broadcast television front end Download PDFInfo
- Publication number
- CN115225842A CN115225842A CN202110399662.0A CN202110399662A CN115225842A CN 115225842 A CN115225842 A CN 115225842A CN 202110399662 A CN202110399662 A CN 202110399662A CN 115225842 A CN115225842 A CN 115225842A
- Authority
- CN
- China
- Prior art keywords
- information source
- responsible
- signals
- transmission
- scrambling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a broadcast television front-end ultra-high definition system, which comprises an information source system and a matching system; the information source system is responsible for receiving and processing information source signals and transmitting the information source signals to the RHE radio frequency processing front end for transmission; the matching system is responsible for providing matching management function support for the information source system. The system supports a broadcast television front-end information source processing platform which integrates multi-information source receiving of 5G, satellite and the like, digital video and audio processing and multi-format information source distribution for 4K and 8K transmission, and builds an ultra high definition front end with comprehensive functions, flexible expansion, safety and stability, can meet the requirements of existing high standard definition and 4K ultra high definition receiving, transcoding and transparent transmission, has the capability of online multiple sets of 4K and 8K programs in the future, and has sufficient expansion space. The problem of the receiving and transmitting requirements of 8K in a cable television network is solved.
Description
Technical Field
The invention relates to a broadcast television front-end ultra-high definition system, which relates to the fields of digital video and audio broadcasting, multi-format information source distribution, intelligent operation and maintenance and the like.
Background
With the continuous progress of audio-video technology, people have made higher demands on audio-video. The definition of video images is higher and higher, the color is more and more vivid, and the sound effect is more shocking. As early as 8 months in 2012, the american society for consumer electronics has proposed the concept of "Ultra High Definition" with Ultra High Definition "and has given its Definition that its resolution is at least 3840x2160 pixels. The resolution was defined by 4K as 4960x2160, but the transfer width was reduced to 3840 due to adaptation to 16. 4K is twice as large as 1920x1080 high definition in both width and height pixel values, making the overall resolution 4 times higher. Although 8K programs in China are formally broadcasted, the 8K programs are transmitted by 5G and broadcasted in public places. The traditional cable television front end cannot receive a 5G source, the program is not transmitted, and the single frequency point 38.1M bandwidth of the front end 64QAM cannot meet the 120Mbps bandwidth requirement of transmitting the 8K program. Under the big background of three-network convergence, cable television operators obtain 5G license plates, and the problem of the requirement of receiving and transmitting 8K in the cable television network is urgently needed to be solved at present.
Disclosure of Invention
The invention provides a broadcast television front-end ultra-high definition system, which supports a broadcast television front-end information source processing platform which is transmitted by 4K and 8K and integrates multi-information-source receiving of 5G, satellite and the like, digital video and audio processing and multi-format information source distribution, and builds an IP front end with comprehensive functions, flexible expansion, safety and stability, wherein the IP front end can meet the requirements of the existing high standard definition and 4K ultra-high definition receiving, transcoding and transparent transmission, has the capability of on-line multiple sets of 4K and 8K programs in the future and has sufficient expansion space. The method meets the safe transmission requirement of the digital television of the existing HFC network in the transmission link, can also support the future evolution to FTTH and IP transmission systems, simultaneously supports the evolution from single media to full media fusion development, and finally completes the conversion from the front end of the traditional broadcast television to the front end of the intelligent broadcast television.
The system comprises a signal source system and a matching system; the information source system is responsible for receiving and processing information source signals and transmitting the information source signals to the RHE radio frequency processing front end for transmission, and comprises an information source receiving system, an information source processing system, a multiplexing scrambling system and a distribution transmission system; the matching system is responsible for providing matching management function support for the information source system and comprises an illegal inter-cut prevention system, a monitoring system, a resource management and comprehensive network management system, an EPG application system and an NTP application system;
the information source receiving system is responsible for carrying out centralized receiving processing on signals sent from different information source parties, realizing the main-standby switching function of a plurality of information sources, is connected with the information source processing system and transmits the information sources to the information source processing system;
the information source processing system is responsible for converting and correcting parameters of video and audio formats of all information source programs, providing signal sources with uniform, standard and normative formats for a later-stage system, connecting the signal sources with the multiplexing scrambling system and transmitting signals to the multiplexing scrambling system;
the multiplexing scrambling system is responsible for the multiplexing of live programs, CA scrambling and signaling EPG insertion functions, is connected with the distribution transmission system and transmits processed signals to the distribution transmission system;
the distribution transmission system is responsible for link switching and isolation distribution tasks of transmission signals and finally distributes the program signals to the RHE radio frequency processing front end;
the illegal inter-cut prevention system is responsible for carrying out illegal attack discrimination monitoring on satellite L-waveband signals, realizes safety monitoring and quality monitoring of satellite programs, and ensures safe transmission of normal and legal program signals.
The monitoring system is responsible for index monitoring and image monitoring of signals transmitted by each link of the front-end system, and the monitoring analysis alarm software is used for uniformly storing, managing and analyzing index data and displaying the program quality condition of a transmission link of the whole front-end system;
the resource management and comprehensive network management system is responsible for centralized management and control of IT infrastructure resources and a non-live link service system and dynamic adjustment of a resource pool. The requirements of each service system on calculation, storage, network and safety resources are met, and the unified management of equipment resources and service resources is carried out on each front-end system.
The EPG application system is responsible for providing program information for the digital television system;
the NTP system is responsible for providing uniform time for devices in other systems, such as a server, a host, network equipment, safety equipment and the like, and ensures that time information is correct when the systems interact with each other through a standard NTP protocol.
2. The broadcast television front-end ultra-high definition system further comprises: the source receiving system device includes: a demultiplexer, an L-band optical receiver, an L-band switch, a radio frequency switch, a power divider, a satellite receiver, a non-switch, a DS3/ASI adapter, an ASI distributor, a convergence switch, a pre-multiplexer, and a switching multiplexer.
3. The broadcast television front-end ultra-high definition system further comprises: the source processing system device includes: decoder, transcoder, encoder, aggregation switch.
4. The broadcast television front-end ultra high definition system further comprises: the apparatus for multiplexing scrambling systems includes: clear stream multiplexer, scrambling multiplexer, aggregation switch.
5. The broadcast television front-end ultra-high definition system further comprises: the apparatus of the distribution transmission system includes: a switching multiplexer, an optical switch, a switch.
Drawings
Fig. 1 is a schematic structural diagram of a broadcast television front-end ultra-high-definition system.
Figure 2 source reception system satellite source reception diagram.
Fig. 3 source receiving system SDH source receiving diagram.
Fig. 4 source receiving system 5G source receiving diagram.
Fig. 5 shows a schematic diagram of source convergence switching in a source receiving system.
Fig. 6 is a schematic diagram of high definition and ultra high definition encoding of a source receiving system of a source processing system.
Fig. 7 is a schematic diagram of a multiplex scrambling system.
Fig. 8 is a schematic diagram of a distribution transmission system.
Detailed Description
The structure of the broadcast television front-end ultra high definition system is shown in fig. 1, and includes:
1. the information source receiving system (101) mainly completes centralized receiving processing of signals sent from different information source sides and realizes the main-standby switching function of a plurality of paths of information sources.
2. And the information source processing system (102) is mainly used for converting the video and audio formats of all information source programs and modifying parameters, and providing signal sources with uniform, standard and normative formats for a later-stage system.
3. And the multiplexing scrambling system (103) mainly completes the functions of multiplexing live programs, CA scrambling, signaling EPG insertion and the like.
4. And the distribution transmission system (104) mainly completes link switching and isolation distribution tasks of transmission signals and finally distributes the program signals to the RHE radio frequency processing front end and other internal service systems.
5. The illegal inter cut prevention system (105) is mainly used for carrying out illegal attack discrimination monitoring on satellite L-waveband signals, realizing safety monitoring and quality monitoring of satellite programs and ensuring the safe transmission of normal and legal program signals.
6. And the monitoring system (106) is mainly responsible for index monitoring and image monitoring of signals transmitted by each link of the front-end system, and uniformly storing, managing and analyzing index data through monitoring, analyzing and alarming software to display the program quality condition of a transmission link of the whole front-end system.
7. The resource management and comprehensive network management system (107) mainly realizes centralized management and control of IT infrastructure resources and a non-live link service system and dynamic adjustment of a resource pool. And the requirements of each business system on computing, storage, network and security resources are met. And uniformly managing equipment resources and service resources of each front-end system.
And 8, an EPG application system, an NTP application system and the like (108), wherein the EPG system provides program information for the digital television system. The NTP system can provide uniform time for devices in other systems, such as servers, hosts, network devices, security devices, and the like, through a standard NTP protocol, and ensure the correctness of time information during interaction of each system.
Satellite source reception for a source reception system is shown in fig. 2. Satellite communication stars on an L band signal by taking NS4 as a modulation mode, provides a 64APSK modulation mode through a plurality of amplitude and phase symbols, finally realizes the transmission rate of 358Mbps in a 72MHz transponder, and can meet the staring transmission requirement of 8K programs. Satellite receivers fall into two categories: an unvoiced satellite receiver and a scrambled satellite receiver. The clear stream satellite receiver receives the satellite signal and then converts the satellite signal to output IP multicast, and the scrambling satellite receiver receives the satellite signal and descrambles the satellite signal and then converts the satellite signal to output the IP multicast. The satellite convergence switch set performs centralized convergence on the IP multicast output by the satellite receiver and outputs the IP multicast to the main/standby switching pre-multiplexer set.
Source reception system SDH source reception is shown in figure 3. 8K and other programs are received over a dedicated fiber optic line using SDH transmission technology. The main and standby optical fiber private line information sources output IP multicast clear stream signals to the main and standby SDH information source convergence switch respectively through the DS3/IP adaptive descrambler.
Source sink system source convergence switching is shown in fig. 5. All the information sources including main and standby satellite information sources, optical fiber special line information sources and the like are gathered into respective main and standby information source switches. The program source is transmitted to the main and standby switching pre-multiplexer group through the main and standby satellite information source switch, the optical fiber private line information source switch and other information source switches in a crossed mode, and port level and program level backup is conducted at the switching pre-multiplexer. The switching pre-multiplexer analyzes information source indexes in detail, manually or automatically switches program information sources of multilink backup by using a multilayer program level backup function, modifies information such as program PID (proportion integration differentiation), and sends the switched and selected programs to a subsequent main and standby information source aggregation switch. The switching pre-multiplexer is controlled by the illegal inter-cut prevention system, and when the satellite signal is interfered by an illegal signal, the illegal inter-cut prevention system can control the switching pre-multiplexer through the network management interface to complete the program cushion output.
Source reception system high definition and ultra high definition coding for a source processing system is shown in fig. 6. The IP front end reserves a video and audio processing link for the 8K ultra-high definition program, and because the existing set top boxes do not support AVS3 and 8K broadcasting, the set top box supporting 8K in the future certainly meets the AVS3 standard, the 8K program can be directly transmitted and output without transcoding. If coding and transcoding are needed, the full IP front end can flexibly adjust the transmission of the 8K baseband signals of the 100Gbps network to the SDI convergence switch through the SDI over IP technology, or the SDI baseband signals are transmitted to a rear-stage encoder directly by adopting 4 multiplied by 12G SDI, and the encoder outputs TS over IP signals.
The multiplex scrambling system structure is shown in fig. 7. The multiplexing scrambling system comprises a clear stream multiplexer, a scrambling multiplexer, a convergence switch and the like. The multiplexing scrambling system completes the functions of multiplexing of live programs, CA scrambling, signaling EPG insertion and the like. The 8K program is transmitted between the multiplexer and the switch via TS over IP signals. The multiplexer output interface bandwidth should meet the transmission requirements. The multiplexer in the multiplexing scrambling system has a port and a program switching selection function, can receive the program signals output by the primary and secondary coding and transcoding processing input by the previous stage, and completes the selection and switching of the primary and secondary signals through a switching panel. The system comprises: clear stream multiplexing and scrambling multiplexing. Clear stream and scrambling multiplex code stream output by the system form two groups of transmission signals and send the two groups of transmission signals to a distribution full link switching multiplexer; the two groups of code streams (4 paths in total) can be selectively switched by the switching control panel. If the input information source comes from the coding aggregation switch, the multiplexing of multi-channel programs and the insertion of signaling are completed according to the programming of transmission channels, 50 paths of MPTS code streams of the main and the standby are output and transmitted to the clear stream aggregation switch, a signal source is provided for the subsequent scrambling multiplexer, and signals output by the main and the standby clear stream multiplexers are transmitted to the full link switching multiplexer in the distribution transmission system. If the input information source is from the clear stream aggregation switch and is matched with the CA system to complete the scrambling of 50 paths of MPTS code stream programs of the main and standby channels, the signals output by the main and standby scrambling multiplexers enter the main and standby scrambling aggregation switch and are output to the full link switching multiplexer after being aggregated.
The distribution transmission system structure is shown in fig. 8. The main equipment of the distribution transmission system comprises equipment such as a switching multiplexer, an optical switch and a switch. The distribution transmission system distributes the information source programs processed in each link to a plurality of service application systems at the later stage, and each service application system transmission link supports the transmission capability of 10Gbps available bandwidth.
The distribution transmission system is divided into coding information source distribution and multiplexing information source distribution, wherein the coding and transcoding clear stream programs are distributed in the former way, and signal sources are provided for other internal service systems; the latter distributes the multiplexed scrambled program (including the backup clear stream transmission signal) to provide a transmission signal source for the RHE RF front end.
The multiplexing information source distribution obtains a full set of main and standby scrambling signals and main and standby clear stream signals from the multiplexing scrambling system, and after the signals cross and enter the full link switching multiplexer, the signals are selectively switched, and a switching control panel is configured to perform signal switching operation on a broadcasting control station, scrambling multiplexing streams are preferentially used, and clear streams are then used. Then the signal is sent to the optical switcher with the main circuit direct-through output function, and the switching control panel is configured to carry out signal switching operation on the broadcasting console. In addition, in order to prevent the full link switching multiplexer from being in failure, an emergency protection circuit needs to be added in the scrambling convergence switch and the optical switch.
After switching, the signals enter the main and standby distribution switch, on one hand, the signals are output to the main and standby IPQAMs in the total front end RHE system in a cross mode, modulated into radio frequency signals and then sent to the HFC network, and user coverage is completed.
Claims (5)
1. A broadcast television front-end ultra high definition system is characterized in that: the system comprises a signal source system and a matching system; the information source system is responsible for receiving and processing information source signals and transmitting the information source signals to the RHE radio frequency processing front end for transmission, and comprises an information source receiving system, an information source processing system, a multiplexing scrambling system and a distribution transmission system; the matching system is responsible for providing matching management function support for the information source system and comprises an illegal inter cut prevention system, a monitoring system, a resource management and comprehensive network management system, an EPG application system and an NTP application system;
the information source receiving system is responsible for carrying out centralized receiving processing on signals sent from different information source parties, realizing the main-standby switching function of a plurality of information sources, is connected with the information source processing system and transmits the information sources to the information source processing system;
the information source processing system is responsible for converting and correcting parameters of video and audio formats of all information source programs, providing signal sources with uniform, standard and normative formats for a later-stage system, connecting the signal sources with the multiplexing scrambling system and transmitting signals to the multiplexing scrambling system;
the multiplexing scrambling system is responsible for the multiplexing, CA scrambling and signaling EPG inserting functions of the live programs, is connected with the distribution transmission system and transmits the processed signals to the distribution transmission system;
the distribution transmission system is responsible for link switching and isolation distribution tasks of transmission signals, and finally distributes program signals to the RHE radio frequency processing front end;
the illegal inter-cut prevention system is responsible for carrying out illegal attack discrimination monitoring on satellite L-waveband signals, realizes safety monitoring and quality monitoring of satellite programs, and ensures safe transmission of normal and legal program signals.
The monitoring system is responsible for index monitoring and image monitoring of signals transmitted by each link of the front-end system, and index data is uniformly stored, managed and analyzed through monitoring, analyzing and alarming software to display the program quality condition of the transmission link of the whole front-end system;
the resource management and comprehensive network management system is responsible for centralized management and control of IT infrastructure resources and a non-live link service system and dynamic adjustment of a resource pool. The requirements of each service system on calculation, storage, network and safety resources are met, and the unified management of equipment resources and service resources is carried out on each front-end system.
The EPG application system is responsible for providing program information for the digital television system;
the NTP system is responsible for providing uniform time for devices in other systems, such as a server, a host, network equipment, safety equipment and the like, and ensures that time information is correct when the systems interact with each other through a standard NTP protocol.
2. The broadcast television front end ultra high definition system of claim 1, wherein: the source receiving system device includes: wavelength division demultiplexer, L wave band optical receiver, L wave band switcher, radio frequency switcher, power divider, satellite receiver, anti-non switcher, DS3/ASI adapter, ASI distributor, convergence switch, pre-multiplexer and switching multiplexer.
3. The broadcast television front end ultra high definition system of claim 1, wherein: the source processing system device includes: decoder, transcoder, encoder, aggregation switch.
4. The broadcast television front end ultra high definition system of claim 1, wherein: the apparatus of the multiplex scrambling system includes: clear stream multiplexer, scrambling multiplexer, aggregation switch.
5. The broadcast television front end ultra high definition system of claim 1, wherein: the apparatus of the distribution transmission system includes: a switching multiplexer, an optical switch, a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399662.0A CN115225842A (en) | 2021-04-14 | 2021-04-14 | High-definition system of broadcast television front end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399662.0A CN115225842A (en) | 2021-04-14 | 2021-04-14 | High-definition system of broadcast television front end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115225842A true CN115225842A (en) | 2022-10-21 |
Family
ID=83604720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110399662.0A Pending CN115225842A (en) | 2021-04-14 | 2021-04-14 | High-definition system of broadcast television front end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115225842A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115695912A (en) * | 2022-10-27 | 2023-02-03 | 北京华建云鼎科技股份公司 | Multi-channel ASI signal processing system |
-
2021
- 2021-04-14 CN CN202110399662.0A patent/CN115225842A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115695912A (en) * | 2022-10-27 | 2023-02-03 | 北京华建云鼎科技股份公司 | Multi-channel ASI signal processing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1387511B1 (en) | Broadcast/communication unified passive optical network system | |
| US20050111844A1 (en) | Apparatus and method for providing HFC forward path spectrum | |
| WO2002054766A1 (en) | An intelligent device system and method for distribution of digital signals on a wideband signal dfistribution system | |
| EP1999919B1 (en) | Video over cable modem | |
| JPH07183870A (en) | Optical transmission cable broadcasting system | |
| US20050027786A1 (en) | MPTS-SPTS separation device | |
| US8548457B2 (en) | Providing flexible RF channel to port mappings | |
| US5982413A (en) | Mixed analog-digital service distribution system and method | |
| CN115225842A (en) | High-definition system of broadcast television front end | |
| US7934228B2 (en) | Method and system for marking video signals for identification | |
| US9055316B2 (en) | Method and system for inserting digital video effects into a video stream at a multiplexing device after routing | |
| CN109218760B (en) | Method and device for modulating large-code-rate program | |
| US8239913B2 (en) | Method and system for inserting digital video effects into a video stream in redundant paths before routing | |
| US20080240258A1 (en) | Method and system for generating uplink signals from a ground segment | |
| US20080244663A1 (en) | Method and system for inserting digital video effects into a video stream using a bypass router | |
| JP2009260979A (en) | Transmitting and receiving system and transmitting and receiving method | |
| KR19980077374A (en) | LMDS HEADEND DEVICE | |
| CN101461186A (en) | Local digital video distribution system for cable | |
| KR0168933B1 (en) | Optic spliter of a low price video network | |
| KR20160076694A (en) | Apparatus and method for transmitting UHDTV broadcasting signal | |
| Roh et al. | Design and Implementation of a Signaling Protocol to Transmit UHDTV Contents in the Cable Broadcast Network | |
| EP1439699A1 (en) | Arrangement for distributing digital video program information | |
| KR20160076695A (en) | Apparatus and method for transmitting UHDTV broadcasting signal | |
| KR200426766Y1 (en) | Device for Digital Broadcasting, Analogue Broadcasting and Data integrated forward System | |
| Brady | The realization of integrated services in a digital distributed star local network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |